};
#ifdef CONFIG_DCB
-extern int register_dcbevent_notifier(struct notifier_block *nb);
-extern int unregister_dcbevent_notifier(struct notifier_block *nb);
-extern int call_dcbevent_notifiers(unsigned long val, void *v);
+int register_dcbevent_notifier(struct notifier_block *nb);
+int unregister_dcbevent_notifier(struct notifier_block *nb);
+int call_dcbevent_notifiers(unsigned long val, void *v);
#else
static inline int
register_dcbevent_notifier(struct notifier_block *nb)